The spectroscopic orbit of the W Ursae Majoris system V508 Ophiuchi

Details The spectroscopic orbit of the W Ursae Majoris system V508 Ophiuchi The spectroscopic orbit of the W Ursae Majoris system V508 Ophiuchi

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..577l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, June 1986, p. 577-580.

Astronomy and Astrophysics

Astrophysics

8

Eclipsing Binary Stars, Stellar Orbits, Stellar Spectra, Orbital Elements, Radial Velocity, Stellar Luminosity

Scientific paper

The spectroscopic orbit of the W UMa system V508 Oph has been studied using spectrograms obtained in 1985 with a 1.8-m telescope and the intensified Reticon detector at the Dominion Astrophysical Observatory. Orbital elements were derived separately for each component of the system, assuming a circular orbit. The spectroscopic orbital elements, determined for the first time, are T(0) = 2446254.8384, K1 = 119.1 km/s, and K2 = 229.2 km/s, with the systemic velocity estimated to be approximately -36.4 km/s. Spectroscopic measurements yielded a value for the luminosity ratio (in blue light) of 1.69. The components of V508 Oph are classified as G0 V (the more massive as well as more luminous star) and G2 V. Thus, V508 Oph is an A-type W UMa system.

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